#include<stdio.h>
int main()
{
int years;
scanf("%d",&years);
if(years<1)
{
printf("Invalid_Input");
}
else if(1<years<=5)
{
printf("5%%");
}
else if(6<years<=10)
{
printf("10%%");
}
else
{
printf("15%%");
}
return 0;